The 'System' of Wing Chun is very specific. It has structure, literature (kuit) and a braod curriculum that gives an overview of the initial idea of Wing Chun Martial Art.
The 'Style' of Wing Chun is personal. It may have influences from other arts, your own life circumstance and may only cover a parts of the 'System' due to an individuals experience with one or many Wing Chun teachers.
So, what are your thoughts?
Personally, I have my own style of teaching but I do like to keep to the curriculums of the system I was taught.